A simple one-step heat treatment process for preparing biaxially textured buffer layers on rolled Ni tape for high Tc coated conductors’ application

One-Step Sol-Gel Growth of Textured Buffer Layers on Cold-Rolled Ni Substrates for Coated Conductor Fabrication

“…Using this new technique we are able to fabricate biaxially textured buffer layers efficiently and cheaply. Moreover, in our experiments the texture quality obtained using the STEX technique is similar to, or better than, that obtained using the standard RABiTS technique [12].…”

“…From these results we conclude that a -cube texture is formed on the cold-rolled Ni substrate during the STEX process, which indicates cube-on-cube texture formation by the STEX method. Evidence for this is also indicated by a pole-figure analysis of the films and Ni substrates [12]. Fig.…”

“…Is it possible then that texture formation in the substrate and buffer layer preparation can be completed using just one single heat treatment step? To test this idea we have developed a new one-step annealing method for direct fabrication of biaxially textured buffer layers on cold rolled Ni tapes, using a sol-gel method, namely the simultaneous texture (STEX) technique [12]. Using this new technique we are able to fabricate biaxially textured buffer layers efficiently and cheaply.…”

Dielectric properties of ⟨001⟩-oriented Ba0.6Sr0.4TiO3 thin films on polycrystalline metal tapes using biaxially oriented MgO∕γ-Al2O3 buffer layers

“…3 Integration with metal foils is less straightforward: The only approach found in the literature is the use of rolling-assisted ͗001͘-textured Ni tapes as substrates for the growth of ͗001͘-oriented ͑Ba, Sr͒TiO 3 films. 4,5 However, the use of rolling to enable ͗001͘ orientation in the substrate limits the versatility of this approach. Therefore, it would be advantageous for many applications if a technology were available that would allow growth of highly oriented ͑Ba, Sr͒TiO 3 films on a variety of nonsingle-crystalline substrates.…”

“…4,5 The higher values of r of the ͑Ba, Sr͒TiO 3 films on rolling-textured Ni tapes may come from a different deposition technique ͑chemical solution deposition͒ and higher deposition temperatures ͑900-1000°C͒. 4,5 In conclusion, we have investigated the dielectric properties of ͗001͘-oriented Ba 0.6 Sr 0.4 TiO 3 thin films on polycrystalline Ni-alloy tapes grown by PLD using biaxially oriented ␥-Al 2 O 3 / MgO buffer layers. The dielectric constant and the dielectric tunability at room temperature of the ͗001͘-oriented films were comparable with those in the epitaxial BST film on single-crystal substrates.…”